When The BizTalk Pipeline Component for Host Data Conversion cannot load the .NET Framework assembly that defines the data conversion in Microsoft Host Integration Server 2010, the component does not return an error. When this occurs, no data conversion is performed for files that are submitted to the component.
The hotfix that resolves this issue is included in cumulative update package 4 for Host Integration Server 2010.
For more information about how to obtain the cumulative update package, click the following article number to view the article in the Microsoft Knowledge Base:
2691943 Cumulative update package 4 for Host Integration Server 2010
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
After this update is applied, the BizTalk Pipeline Component for Host Data Conversion returns an "Invalid assembly path" error message when it cannot load the .NET Framework assembly. This error message is logged in the Application log and in the Microsoft BizTalk Server Administration console.